/Engine/Plugins/Online/OnlineSubsystemSteam/Source/Public/OnlineSubsystemSteam.h
INTERNALClear the metadata related to a given user's file on Steam This information is only available after calling EnumerateUserFiles It doesn't actually delete any of the actual data on disk
the true if the delete was successful, false otherwise
bool ClearUserCloudMetadata ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & UserId, const [FString](API\Runtime\Core\Containers\FString) & Filename )